Servlet過濾器會話超時問題

Question

我有蒙山會話超時檢查Servlet過濾器：

@Override 
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { 
    HttpServletRequest req = (HttpServletRequest) servletRequest; 
    HttpServletResponse res = (HttpServletResponse) servletResponse; 
    String uri = req.getRequestURI(); 
    if (req.getUserPrincipal() == null && !uri.endsWith("login.xhtml") && uri.endsWith("xhtml")) { 
     res.reset(); 
     res.setHeader("Location", "/nsi/faces/login.xhtml"); 
     res.setStatus(HttpServletResponse.SC_FOUND); 
     res.setContentType("xhtml"); 
     // filterChain.doFilter(servletRequest, servletResponse); 
     // req.getServletContext().getRequestDispatcher("/faces/login.xhtml").forward(req, res); 
    } else { 
     filterChain.doFilter(servletRequest, servletResponse); 
    } 
} 

爲什麼當會話超時重定向不工作？我嘗試使用HttpServletResponse.sendRedirect和HttpServletResponse轉發。 P.s.獲取請求重定向，但POST請求進入方法並且什麼都不做;

Answer 1

在JSF中，你可以做這樣

FacesContext.getCurrentInstance（）getExternalContext（） .redirect（ 「/面/ login.xhtml」）。

Answer 2

之後response.sendRedirect("/faces/login.xhtml");你應該做一個return;。

以下過濾器將重定向到根網址的所有請求Google.nl上：

@WebFilter("/*") 
public class RedirectFilter implements Filter { 

    public void destroy() {} 

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, 
      FilterChain chain) throws IOException, ServletException { 
     HttpServletResponse res = (HttpServletResponse) servletResponse; 
     res.sendRedirect("https://www.google.nl"); 
     return; 
    } 

    public void init(FilterConfig arg0) throws ServletException {} 

}